Wrench



J. JARQS.

WRENCH. APPLICATION FILED NOV. 3, I919.

Pteritd' Feb. 15, 1921.;

I N VEN TOR,"

JO HN JAROS, OF OKLAHOMA, OKLAHOMA.

WRENCH.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed November 3, 1919. Serial No. 335.254.

To all whom it may concern:

Be it known that I, JOHN JARos, a subject of the Emperor of Austria, and a resident of Oklahoma city, in the county of Oklahoma and State of Oklahoma, have invented certain Improvements in Wrenches, of which the following is a specification, reference being had to the accompanying drawin s.

Ihe invention pertains to wrenches in which the jaws are relatively movable.

In wrenches of this class one of the jaws is unusually formed integrally on the end of a shank and the other jaw is fitted slidably on the shank, a screw being provided to force the jaws together.

One object of the invention is to provide means whereby the sliding jaw will fit or embrace the shank more closely while being acted upon by the screw.

Other objects and advantages of the invention will be set forth in the ensuing description.

Flgure 1 of the drawings is an elevation view of the improved wrench, with portions broken away to expose interior construction.

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is a view in the same direction as Fig. 1, showing the sliding jaw.

Flg. 4 is a similar view showing a fragment of the shank.

Fig. 5 is an enlarged sectional view taken on the line 55 of Fig. 1, with the shank and a certain spring omitted.

Like characters of reference designate like parts in all the figures.

The wrench shown includes the shank 6 with the stationary jaw 7 formed integrally on its upper end; the movable jaw 8 which is fitted to slide on the shank and co-act with the jaw 7; and a tubular handle 9 which is screwthreaded to the lower end of the shank and adapted to force the jaws together.

For purposes later shown, the movable jaw 8 is in skeleton form, and in this instance the upper end 9 of the handle 9 is journaled through the lower annular portion 8 of said jaw and has a shoulder 9 which bears against said annular portion.

A nut 10 is screwthreaded to the handle 9 above the annular portion 8 of the jaw 8 to hold the parts in assemblage; and a spring washer 11, shown shaded in solid black in Fig. 1, is interposed between said nut and v the annular portion 8 'nections assuming the annular portion to frictionally hold the handle from revolving too easily.

For convenience in handling the wrench, a compression spring 12 is interposed between the removable lower end 13 of the handle 9 and the shoulder 6 of the shank 6, this sprlng being held in line by a downward extenslon 6 of said shank and by a sleeve 13 on the lower end portion 13 in which said extension slidably fits.

To aflord quick-action adjustment of the movable j aw 8, only a small portion 6 covermg, say, sixty degrees of the circumference of the shank 6 is threaded, and a like or slightly greater portion of the threads in the handle 9 are cut away as at 9 in Fig. 5.

By this arrangement the handle 9, when revolved to a certain position, is freed from threaded engagement with the shank 6 and.

may be freely slid thereon for quick movement of the jaw 8.

The lowerannular portion 8 of the skeleton jaw 8 is integrally joined to the upper portion 8' by the two connections 8 which, forda portion of their length downward from sai against the edges of the shank 6.

The S curve formation of the connections 8 allows them to be put under spring tension by screwing the handle 9 up against of the jaw 8, said conposition indicated to 15. 1 exgggerated degree by the dotted lines in In being placed under tension, each connection 8 pivots at or near its upper and lower ends, so that the central portions of said connections which lie inside of the straight lines AA (Fig. 3) passing through the pivotal points 8 are forcibly buckled inward against the shank 6 and take up lost motion between said shank and the jaw 8.

The following is claimed 1. In a wrench, a shank having a jaw at one of its ends, a second jaw slidable on the shank, means on the shank for forcing the jaws together, the slidable jaw being provided with yielding elastic arms so formed that when acted upon by the forcing means they tighten their embrace on the shank.

In a wrench, a shank having a jawat one of its ends, a second jaw slidable on the shank, means on the shank for forcing the jaws together, the sliding jaw being 'skeleupper portion 8, have a sliding fit means they buckle inward and bind the shank. V y

3. In a wrench, a shank having a jaw at one of its ends, a second jaw slidably embracing the shank, means on the shank for forcing the jaws together, that portion of the sliding 10 jaw against which the forcing meansacts being connected to the remainer of said jaw by yielding elastic curved connections which are adapted to be sprung from a straight line 7 by action of the forcing meansand the portions between the curved parts and the slid- 15 ing jaw buckled inward to thereby bind the shank, the shank having a toothed portion and a handle having threads to engage therewith.

1919; r ,v c 7 JOHN JAROS.

Witness my hand this 15th day or October, 20 

